Answer:
#3: 4
#4: 1
Explanation:
To figure out #3, you must draw a vertical line across y = 4. Note that f(x) is the same as y. The positive x-coordinate the line intersects is approximately 7.5. Hence, 4 is the answer.
To figure out #4, you must locate the x-coordinates of all the points on the x-axis. They are -6, 2, 7. Therefore, 1 is the answer.
Hopefully this helps